NIA

NIA, Nia, or nia may refer to:


 * Nia (given name), including a list of people and fictional characters
 * Nia (fitness), a type of aerobic exercise
 * NIA, a spanish salsa singer
 * Nia (fungus), a genus of marine fungi
 * SS Nia, a French steamship in service 1952–54
 * Nia, a principle of Kwanza
 * Nia (album), a music album by Blackalicious
 * Project NIA, an American organization supporting youth in trouble with the law
 * ICAO designator of Nile Air, an Egyptian airline
 * IATA code of Nimba Airport, Nimba, Liberia
 * nia, ISO 639-2 and -3 codes for the Nias language

Acronyms

 * National Intelligence Agency, former name of the State Intelligence Services (the Gambia)
 * Nanotechnology Industries Association, an international association of nanotechnology companies
 * National Immigration Administration, an agency under the Ministry of Public Security in the People's Republic of China
 * National Immigration Agency, an agency under the Ministry of the Interior in the Republic of China (Taiwan)
 * National Infrastructure Assessment, published by the UK National Infrastructure Commission
 * National Indoor Arena, former name of an indoor arena in Birmingham, England, United Kingdom
 * National Institute of Accountants, the former name until 2011 for the Institute of Public Accountants in Australia
 * National Institute of Aerospace, an aerospace research institute in the United States
 * National Institute on Aging, a health research institute in the United States
 * National Institute of Ayurveda, apex training and research institute in Ayurveda in India
 * National Insurance Academy (NIA Pune), an insurance educational institute in India
 * National Intelligence Agency (disambiguation), various governmental organizations
 * National Intelligence Authority, a United States government authority from 1946 to 1947
 * National Investigation Agency, the counter-terrorism agency in India
 * National Iraqi Alliance, a Shi'a Islamist electoral coalition in Iraq
 * National Irrigation Administration, a Philippine government agency for irrigation development and management
 * Nature Improvement Area, a UK landscape-scale nature conservation designation
 * Net income attributable, a concept in the United States tax code related to Individual Retirement Accounts
 * Net Internal Area, a methodology for measuring building areas for real estate
 * Neural Impulse Actuator, a peripheral for gaming on Windows computers
 * Nigerian Institute of Architects, a professional association in Nigeria
 * informal acronym for Noi Bai International Airport, Hanoi, Vietnam
 * Northern Ireland Assembly, the legislature of Northern Ireland
 * Nuclear Industry Association, the trade association for the UK's civil nuclear industry